Saw blade



FIG. 1 is a perspective view of a saw blade showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being identical thereto;

FIG. 3 is a right side elevation view thereof, the left side elevation view being a mirror image thereof; and,

FIG. 4 is a rear elevation view thereof.

The broken line portions of the figures show environmental structure only and form no part of the claimed design. 

The ornamental design for a saw blade, substantially as shown and described. 